title: The rectenna design on contact lens for wireless powering of the active intraocular pressure monitoring system.
abstract: This paper proposed a wireless power harvesting system with micro-electro-mechanical-systems (MEMS) fabrication for noninvasive intraocular pressure (IOP) measurement on soft contact lens substructure. The power harvesting IC consists of a loop antenna, an impedance matching network and a rectifier. The proposed IC has been designed and fabricated by CMOS 0.18 um process that operates at the ISM band of 5.8 GHz. The antenna and the power harvesting IC would be bonded together by using flip chip bonding technologies without extra wire interference. The circuit utilized an impedance transformation circuit to boost the input RF signal that improves the circuit performance. The proposed design achieves an RF-to-DC conversion efficiency of 35% at 5.8 GHz.
authors.forename: H W
authors.initials: HW
authors.lastname: Cheng
authors.forename: B M
authors.initials: BM
authors.lastname: Jeng
authors.forename: C Y
authors.initials: CY
authors.lastname: Chen
authors.forename: H Y
authors.initials: HY
authors.lastname: Huang
authors.forename: J C
authors.initials: JC
authors.lastname: Chiou
authors.forename: C H
authors.initials: CH
authors.lastname: Luo
mesh_terms: D000818:Animals; D004867:Equipment Design; D007429:Intraocular Pressure / Q000502:physiology*; D055617:Micro-Electrical-Mechanical Systems; D012666:Semiconductors; D013552:Swine; D014065:Tonometry, Ocular / Q000295:instrumentation / Q000379:methods*; D059015:Wireless Technology